<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS练习2</title>
    <style>
        div {
            width: 200px;
            height: 100px;
            border: green 1px solid;

        }
        #one {
            /* margin-bottom: 10px;
            margin-left: 50px;
            margin-top: 100px;
            margin-right: 30px; */
            /* margin: 100px 30px 10px 50px; */
            padding-left: 10px;
            padding-top: 10px;
        }
        #two {
            margin-top: 20px;
         }
        /* body {
            padding-left: 20px;
            padding-top: 50px;
            padding-bottom: 500px;
        } */
    </style>
</head>
<body>
    <div id="one">1111</div>
    <div id="two">2222</div>
    <div id="three">3333</div>
</body>
</html>